Shear hysteresis effects in concrete box girders with simply supported butterfly webs
), Abstract
The butterfly web concrete box girder represents an innovative bridge structure characterized by a hollow butterfly web design. This structure is noted for its lightweight nature, reduced maintenance costs, and abbreviated construction timelines. To investigate the distribution of the shear hysteresis effect, a test beam model of the butterfly web was conceptualized and constructed. Subsequently, static loading tests were conducted, and a corresponding ABAQUS finite element model was developed to align with the experimental conditions. Utilizing the principle of section equivalence, a calculation method for the moment of inertia (Ik) at the hollow web of the box girder was proposed. Furthermore, a formula for determining the shear hysteresis effect of the butterfly web box girder was established through the application of the energy variation method. The findings from the experimental, finite element, and theoretical analyses indicate that the shear hysteresis effect at the hollow web of the butterfly web box girder surpasses that of the solid web. Additionally, the shear hysteresis effect is most pronounced at the intersection of the web and the top plate, diminishing progressively towards the edges. The shear hysteresis effect is also more significant at the supporting and span sections of the box girder. The longitudinal stress values derived from the variational method exhibit an error range of −2.4% to 7.4% when compared to test values under concentrated loads, and a similar error range of −2.4% to 7.4% when compared to finite element values under uniform loads. The discrepancies between the longitudinal stress values and the finite element values range from −2.7% to 3.8%, thereby validating the accuracy of the proposed formula. The outcomes of this research may serve as a valuable reference for the design of butterfly web box girders.
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References
Kasuga, A. Effects of butterfly web design on bridge construction (Reprinted from Struct[J]. Structural Concrete Journal of the Fib, 2017, 18: 128–142.
Huang, R.Y., Kaminaga, Y., Ashizuka, K., et al. Design and Construction of Butterfly Web Bridge-Akutagawa Bridge[J]. Journal of China & Foreign Highway, 2017, 37(3): 149–151.
Jiao, G.R., Chen, J.B., Zhang, Y.F. Study of Bending Performance of Precast Butterfly Web Concrete Box Girders[J]. China Concrete and Cement Products, 2021(5): 43–47.
Zhu, Z.H., Chen, J.B., Jiao, G.R. Calculation and analysis of shear deformation of butterfly web[J]. Journal of Suzhou University of Science and Technology Engineering and Technology edition, 2021, 34(2): 39–43.
Qin, Y.Y., Liu, S.Z., Ma, C., et al. Study on Shear Lag Effect of Single-box Twin-cell Corrugated Steel Web-Steel Floor-Concrete Roof Composite Box Girder[J]. Journal of Highway and Transportation Research and Development, 2020, 37(10): 98–106.
Ma, C., Liu, S.Z., Ji, W. Study on Shear Lag Effect of Single-box Multi-cell PC Composite Box Girder with Corrugated Steel Webs[J]. Journal of Highway and Transportation Research and Development, 2018, 35(2): 62–71,78.
Huang, B.S., Huang, T.J., Wang, W.C., et al. Calculation method of equivalent bending stiffness of castellated beams and analysis of its influence factors[J]. Journal of Building Structures, 2018, 39(S2): 121–127.
Chen, Y.L., Liu, S.Z. Shear lag shear effect of single-box and double-cell thickened wing plate CSW simply supported box girder[J]. Journal of Railway Science and Engineering, 2021, 18(10): 2640–2650.
Gao, L., Zhou, Y., Wang, S.L., et al. Energy-variational method of shear-lag effect in PC box-girder with corrugated steel webs[J]. Journal of Xi’an University of Architecture and Technology (Natural Science Edition), 2022, 54(1): 27–34.
Luo, M., Lin, P.Z., Yang, Z.J., et al. Analysis of shear lag effect of box girder under different section forms[J]. Chinese Journal of Applied Mechanics, 2021, 38(5): 2092–2097.
Wu, Q.M., Jiang, R.J., Xu, T.H., et al. Analysis on shear-lag effect of composite box girders with corrugated steel webs considering shear deformation of webs[J]. Journal of Building Structures, 2021, 42(S1): 220–228.
Li, X.Y., Guo, J.Y., Wan, S., et al. Analysis on Shear Lag Effect of Thin-walled Box Girder Based on Timoshenko Beam Theory[J]. Journal of Highway and Transportation Research and Development, 2018, 35(6): 52–60,94.
Luo, M., Lin, P.Z., Sun, L.X. Experimental study on shear lag effect of twin-cell box girder[J]. Railway Engineering, 2015(10): 56–59.
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